I've Put On A Pound!?

Ok i'm freaking out a little because i weight myself every morning and for the last few months every time i've stepped on the scales i've been exactly the same 120lbs. I stepped on the scales this morning and i was 121lbs. Is a pound gained in weight noticeable when you look at a person? I'm 6'1' by the way so i'm not fat at all. But i just hate gaining weight :(